That is something the dealer has no control over and will happen right about the time the vehicle ships.
We are not certain how Chevy is treating the RS but generally new models are held in Quality Control for several days and each is subjected to an extensive going over by the plant staff. I consider the RS to be a new model, so your RS may not ship for a week or so. If it is not considered a new model, it takes a minimum of two day to ship. I say minimum because I can not think of one instance when a new build shipped quicker.
Laborsmith